Single vs Double Shot Espresso Basket Guide for Breville

When I unboxed my machine, I saw four baskets and panicked. Why are there so many? Do I need to learn four different ways to make coffee?

Here’s the truth I wish someone told me on Day 1: Put the single basket in a drawer and forget about it.

Okay, that’s a bit harsh. But after pulling thousands of shots, I can tell you that 95% of your life will be spent with the Double Basket. Here is why, and when you might actually want the single.

What’s the Difference?

Breville gives you:

1. Single Basket (1-Cup): Shaped like a funnel. Holds ~8-10g.
2. Double Basket (2-Cup): Cylinder shape. Holds ~16-19g.

(Plus the “Dual Wall” versions of each, which are for pre-ground coffee/beginners).

The Single Shot Basket (The Frustrating One)

It’s cone-shaped. This shape is a nightmare for extraction.

• Capacity: 8-10g.
• Output: ~1oz liquid.
• The Problem: Because it tapers at the bottom, water struggles to flow evenly. The edges over-extract, the center under-extracts. It’s incredibly finicky. Tamping it is awkward because most tampers barely fit halfway down the cone.

Use it ONLY if:

• You absolutely refuse to drink more than 1oz of coffee.
• You are testing beans and strictly want to save money.

The Double Shot Basket (The Hero)

It has straight walls.

• Capacity: 16-19g.
• Output: ~2oz (60ml) liquid.
• The Magic: The straight walls allow the puck to compress evenly. Water flows through it uniformly. It’s forgiving, consistent, and tastes better.

Use it for:

• Everything.
• Lattes (most shops use double shots as the base).
• Straight espresso (double shots are the modern standard).
• Splitting (put two cups under the spouts if you really want single servings).

Why I Recommend Starting with Double

I wasted my first kilogram of coffee trying to dial in the single basket. It was sour, then bitter, then choked. I thought the machine was broken. Then I switched to the double basket. Instant success.

1. Forgiveness: Larger pucks tolerate small errors better.
2. Standardization: Every YouTube tutorial, recipe, and guide assumes you are using a double basket (18g dose). Trying to translate “18g in 28 seconds” to a single basket is confusing math.
3. Flavor: Modern espresso is optimized for 1:2 ratios in double baskets. It just tastes balanced.

Dose Recommendations

For Single Shot Basket

You have to under-dose it slightly. Target: 9g. If you put 11g in, it hits the shower screen and explodes (channeling).

For Double Shot Basket

Target: 18g. This is the golden number.

• Dark roasts are fluffy: try 17g.
• Light roasts are dense: try 19g. but 18g is your home base.

The “Split” Technique

“But I only want one coffee!” Use the double basket. Brew 18g. Put two cups under the two spouts. Boom. You have two single shots. Drink one, save one for an iced latte later, or give it to your partner. It’s vastly superior to struggling with the single basket.

Extraction Differences

Flow Characteristics

Single: Fast start, sudden choke, messy puck. Double: Syrupy, steady mouse-tail stream.

Timing Targets

Both aim for 25-30 seconds.

• Single (9g) -> 18g out in 25s.
• Double (18g) -> 36g out in 25s.

The time is the same because the grind resistance balances the water flow.

Practical Tips for Each Basket

If you MUST use the Single Basket:

1. Grind Finer. You need more resistance for fewer grounds.
2. WDT is mandatory. The cone shape clumps easily.
3. Check the clearing. Lock the portafilter, remove it. If the dry puck has a screw imprint, you dosed too much.

For the Double Basket:

1. Dose 18g.
2. Level it.
3. Tamp.
4. Enjoy.

Switching Between Baskets

This is the annoying part. You cannot just swap baskets and brew. Single Basket requires a finer grind setting than the double. So if you switch back and forth, you are constantly adjusting your grinder dial. It’s a waste of beans and patience. Pro Tip: Pick one basket (Double) and marry it. rarely switch.

The Pressurized vs Non-Pressurized Question

Just a reminder: Dual Wall (Pressurized): For pre-ground coffee or when your grinder is broken. It fakes the crema. Single Wall (Non-Pressurized): The real deal. Use this if you have fresh beans and a burr grinder.

FAQ

Can I put 18g in the single basket?

No. It will overflow and make a huge mess.

Can I put 9g in the double basket?

No. The puck will pointlessly turn into muddy soup and the shot will channel instantly. Basket size MUST match dose.

Why are my single basket shots sour?

Because they channel. Also, 9g of coffee has less contact time to extract sweetness than 18g. It’s inherent to the physics.

Should I buy a VST basket?

Eventually, yes. An 18g IMS or VST basket is a great upgrade for the Double. Don’t bother upgrading the single.

Summary

Aspect	Single Basket	Double Basket
Verdict	The Trap	The Standard
Difficulty	Hard Mode	Normal Mode
Use case	Rarely	Always
My Advice	Ignore it	Master it

Bottom line: Don’t be a hero. Use the double basket using the split-spout technique if you need less caffeine. Your tastebuds will thank you.

Happy brewing!